Pump



R. B. CARTER.

I PUMP. APPLICATION F ILED FEB. 9 I9I8.

11,41,994, Patented Mar. 28, 1 9 22.

. 1 INVENTOR 13a! 12 B. far/e1 MM W v I Ill-'1' ATTO Y5 an part of t FHQE,

RALPH B. CTER, 0F HAWORTH, NEW JERSEY.

I intense,

To all it may concern:

Be it known that I, RALPH B. Curran, a.

citizen of the at Haworth in the of New llerse have invented certain new and useful mprovements in Pumps, of which the following is a full, clear, and exact specification, such as will enable others skilled in the art to which it appertains to make and use, the. same.

Tlfis invention relates to improvements in power-operated pumps, and is designed to "obviate United States, residin matically started and stopped, in connection with domestic or similar water supply systems, wherein air. and water are together pumped to a receiving tank, from which the water, under pressure of the air in the storage tank may beled, as desired, to

he premises;

n such water supply plants, it is de sirable that the pumping means shall be thrown into operation automatically when the water in.the storage tank recedes to a certain level, and cut out of operation when the water in the tankhas reached a certain desired quantity. Thus it is necessary that the pump shall not be interrupted b the presence of an air-block, as above re erred to, as this would require the presence of an attendant to look after its operation. The condition of air-block, above referred to, may arise in any ordinary hydraulic pump, but a pump which has an air inlet 'from the exterior atmosphere, and is designed to pump both air and water to place the latter under compression by the air, in a storage tank, is ject to such a condition.

It will be recognized therefore, that such improvements as have the efiect of removing the causes of such air-blocks are particularly subhighly useful, for it is'evident, that, unless; there is a complete absence of air-block.,

or means provided whereby, as. soon as they 7 occur, they can be immediately and auto:

Specification of Letters Patent.

countyof Bergen and tate .tion .the discharge valves from one source-of trouble in pumps,- as at present as to constitute without -requiring,

'plston E, which is actuated,

asapplied to such pumps, is a misnomer slnce anattendant will be required to again start the pump in operation.

The principal object of my present inven- 1s to prevent leakage of air through the discharge chamber to and into the pump chambers.

Another object of my invention is' to provide means for accomplishing the above stated object in pumps especially designed to afford simplicity in construction and accessibility to the parts, without requiring gheli'emoval of the connections'to the storage Another object of my invention is to provide means for stated object in forms of .pumps now used,

structure.

Other objects,

facture and' durability in construction, Wlll be apparent from the following description,

taken -1I1 connection with the drawings, in which:

ig. 1 is a vertical central section and 2 is a verticaltransverse sectlon on line 2-2 of Fig. #1.

Referring to the construction illustrated, B represents the pum casing, formed centrally with an inwar ly pro ecting casting C, which is longitudinally bored to form a, piston cylinder D, wherein reciprocates a through the piston rod- F, from any suitable source of accompanying power. The ends of the casing B are closed l respectively,

bly the heads G, H, providin t e pump. chambers I, J.

lower portion 'ofthe casin B is a suction chamber K, saidsuction chamber being in communication with a'water inlet M, which may be connected to a well or other source of water supply. Secured to the upper portion of the casing 18' is a discharge chamber N, formed by the bonnet O, which chamber, throught the passageway, P, connects with an air chamber P. Suction valves ormed at the the-suction chamber to the pump chamhers I, J, and discharge valves R, R, are located in passageways leadin Patented Mar 28, 1922.. Application filed February 9, 1918. Serial No. M6363.

accomplishing the above any material change in such as economy in manul are provided in passlnigeways leading from,

from the umlp chambers I, J, to thedisc arge chain-- er ment of the piston F,

A threaded opening T is adapted to receive a discharge pipe leading to a storage tank, (not shown), wherein water and air under compression are received, to be drawn on as occasion requires. It will be understood that such pipe will be provided with a check valve to prevent the return flow of water from the storage tank.

The operation of thepump as thus far described needs no particular description except to state that on the'reciprocating movewater is drawn from the suction chamber K, (towhich it is admitted through the 0 ening M), through the suction valves Q, Q into the pump chambers I, J, and, in company with air from the exterior atmosphere, is expelled, under action of the piston F, through the discharge valves R, R, into the discharge chamber and thence through the discharge opening T, to the storage tank (not shown).

No novelty is claimed herein for the pump as thus far described. I will now describe my invention as applied to such pump.

As such pumps have been heretofore constructed, from the opening T a passageway T has led upwardly meeting approximately flush with or lower than the valve deck of the discharge chamber N,as indicated by the dotted lines in the drawings, and the result of such construction has been, as the entrance to passageway T has been level with or lower than the valve deck (indicated at U), the water in the discharge chamber N has been free to completely drain therefrom and the valves R, B, have not been watersealed. Thus the air, which is under compression, in the discharge chamber, has been free to leak past th discharge valves, back and into the pump chambers, there to cause churning of the fluid by the piston, and

, eventually result in an air-block, as I have before described.

Now, in carrying out my invention, instead of having an opening to the passageway, T, and outlet T, approximately at the height of the valve deck U, I provide means whereby the water is taken off at a hi her level than the valve deck, one form of w ich means is clearly shown in the drawings, comprising a threaded portion V, in an opening in the casing B wherein I place the threaded lower end of a take-off member, or standpipe, indicated at V", the upper end of which will preferably normally project into the air chamber P, the result of which construction is that the water passin out through the passageway T', and disc arge 0' opening T, has to first enter and pass 6 through the take-off member V. It will thus be seen that as all thewater passing from the discharge chamber must rise to ,the

top of, and pass into and through the, takeoff member V, it will be impossible, in the operatlon of the pump, to drain the valve deck of the discharge chamber. On the contrary, not only the discharge chamber N but the air chamber P will normally be filled with water to the level of and above the top of the take-off member V. Thus, the valves R, R, will always be water-sealed by a solid body of water standing on the valve deck in that chamber. Since the air will rise above the water, and the water, at the lower level, is impervious to penetration by the air, it will be impossible for air in the air chamber or discharge chamber to seep through and into the pump chamber.

It has been pointed out above that it is desirable that pum ing apparatus of the character herein re erred to shall. be completely automatic. It is also desirable, that, when once installed, it shall not require taking down or taking apart, or call for the work of expert mechanics. It is desirable, however, that access may be had occasionally to certain of the moving parts, for instance for the renewal of the rubber disks of the valves. When they require looking after, in order to get access to the valve deck of the discharge chamber, all that is required is that the bolts securing the bonnet to the pump. casing be loosened, whereupon the bonnet and air chamber can be bodily lifted clear of the valves, exposing the latter to view, for examination or repair or renewal of parts, as may be required. The same is true of the suction valves Q, Q. By-loosening the bolts securing the suction chamber to the pump casing, the entire suction chamber with the valves, may be dropped out of position, for inspection and renewal of parts. leading to the storage tank may remain in place and undisturbed. I provide in such a structure, having the desired features of Thus it will be seen that the piping accessibility of parts, means whereby the valves in the discharge chamber are watersealed by a continually present body of water in the discharge chamber. This, I regard as a radical improvement in the art.

I desire it to be understood that I do not wish to confine myself to the precise de-- tails of construction and arrangement of the invention as herein'set forth, as modification and variation may be made without departing from the spirit oflihe invention as dechamber superposed above said valve-deck, and means communicating with said passageway and extending into said air chamber, for receiving water at a point higher than said discharge-valve openings, and dischar ing the same through said passageway.

3. I1 a combined air and water pump, the combination with a valve-deck having discharge valves and an opening leading to the pump outlet, of means connected with said opening for raising the water to a higher level than the valve-deck and water-sealing said valves and drawing water at said level for discharge from said outlet, thereby preventing a back-flow of air into the pumpchamber.

4. In a combined air and water pump, the combination of a pump-chamber, a discharge chamber, a valve-deck between said chambers having discharge valve openings, said pump having suction inlets for air'and water, and a discharge outlet extending from said valve-deck, means for pumping fluid including water and air from the pumpchamber into the discharge chamber, and a stand-pipe connected to said outlet from said valve-deck and extending into the discharge chamber for raising the level of water around the stand-pipe and above the dis charge valve openin s, thereb reventin a back-flow of air irio the pu r ng-chamber and for receiving fluid for discharge from said outlet.

5. In a combined air and water pump, the combination with a valve-deck having discharge valves and a passage therefrom extending thereunder to the pump outlet, of a stand-pipe connected to said passage in said valve-deck and having a free end extending into the discharge chamber for raising the level of water above the discharge valves,- thereby preventing a back-flow of air into the pump-chamber.

6. Ina combined air and water pump, the combination of a pump-chamber, a discharge chamber, a valve-deck between said chambers having discharge valve openings an opening therein extending under the same to the pump outlet, an air chamber having free communication with the discharge chamber, a stand-pipe connected to the opening in said valve-deck leading to the pump outlet, said stand-pipe having a free end extending into the air chamber for raising the level of water above the discharge valves and'preventing a back-flow of. air into the pump-chamber.

RALPH B. CARTER. 

